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Clarify handling of src in ptr::write #40333

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Mar 9, 2017
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Clarify handling of src in ptr::write #40333

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4 changes: 4 additions & 0 deletions src/libcore/ptr.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -191,6 +191,10 @@ pub unsafe fn read_unaligned<T>(src: *const T) -> T {
/// allocations or resources, so care must be taken not to overwrite an object
/// that should be dropped.
///
/// It does not immediately drop the contents of `src` either; it is rather
/// *moved* into the memory location `dst` and will be dropped whenever that
/// location goes out of scope.
///
/// This is appropriate for initializing uninitialized memory, or overwriting
/// memory that has previously been `read` from.
///
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